In-Game Description

A tiny bug that produced light.
Brightbugs are said to comfort the dead,
and are found in the marshlands leading to the Undead Crypt.

By ingesting a brightbug just before death,
the moment at which they glow most brightly,
one attains great power for a short time.
Often utilized as a last-resort for adventurers who have lost their way.

Has no effect in other worlds or for phantoms.

Use

+20% damage and -20% incoming damage for two minutes.

Cannot be used as a phantom or while White or Gold phantoms are present in the host's world. Cannot be used once invaded by a Red phantom, unknown if effect would persist if used before an invasion (need confirmation on Grey/Blue) .

Availability

Three sold by Merchant Hag Melentia. Her stock replenishes when you advance further in the game, but the price also increases.

The price starts at 6,000 souls, and increases to 12,000, 18,000, 24,000, 36,000, and finally 48,000 souls, each time a specific boss is killed.